Selank + Semax — the Russian nootropic peptides users research for focus, mood, and BDNF support.
The Cognitive Stack pairs Selank (anxiolytic, enkephalin-modulating tuftsin-derived peptide) with Semax (BDNF-upregulating ACTH-fragment analog). Both are intranasally administered and both have decades of clinical research history in Russia, though neither is FDA-approved in the US.
Users research this combination for working memory, focus, and mood regulation under cognitive load. The mechanisms are complementary: Selank reduces anxiety baseline, Semax increases BDNF signaling for neuroplasticity. Together they are researched more often than either alone.
This is educational content about compounds users research and discuss with their clinician. Neither compound is a treatment for anxiety, depression, ADHD, or any cognitive disorder — those require a licensed provider's diagnosis and evidence-based interventions.
Selank is a tuftsin analog that modulates enkephalin and GABA tone — producing anxiolytic effects without benzodiazepine-class dependence risk. Semax is an ACTH(4-10) fragment analog shown to upregulate brain-derived neurotrophic factor (BDNF) in animal and some human studies. The pairing combines state-level anxiety reduction (Selank) with trait-level neuroplasticity signal (Semax).
When running a stack like this, these biomarkers let users see how the compounds perform in context. Trended across draws, they reveal whether the stack is actually moving the markers it should — or producing unintended shifts that warrant a provider conversation.
Community cycles for Selank + Semax commonly run 10–14 days followed by breaks. Continuous long-term use is less common and warrants provider oversight.
A provider should rule out underlying drivers of cognitive complaints (thyroid, sleep apnea, depression, B12/iron deficiency) before attributing gains or failures to a peptide stack.
Log every compound in the stack, upload your lab PDFs, and chart the biomarkers on this page across every draw. StackAI reads the panel in context of what you’re running.
Start tracking free →